Designed with molded foam, the McKesson seat cushion provides support and comfort. Seat donut cushions are ideal for pain and pressure relief associated with hemorrhoid surgery. As a latex-free option, the seat cushion will not cause an allergic reaction to users with allergies. The puncture-resistant foam and sleek design make it suitable for travel as well. Ergonomically designed, the foam donut seat cushion is freestanding and doesn't require any additional straps for support, making it simple and easy to use. Measuring 18 inches in diameter, it's a comfortable fit for most users and also helps to promote proper posture and redistribution of pressure. This non-inflatable seat cushion, with its conforming, molded, open-center design, aids in minimizing the discomfort that occurs at pressure points. For added convenience, the navy seat cushion cover is easily removable for machine washing.